Overdrive and voodoo juice are both good.
Voodoo has higher amounts of bacillus than most beneficial bacteria products on the market. You could cut the dose in half and still see a difference.
Advanced Nutrients Voodoo Juice 1L 5450-14
$63.38 from 5+ stores
Overdrive in my experience does help with yield and oil production, and works best when following the suggested 8ml/gal, and you only use it the last 3 weeks of flowering.
Advanced Nutrients Overdrive
$31.80 from eBay
It is very comparable to Shooting Powder from House and Garden, but cheaper.
I ran Bud Factor X
Advanced Nutrients Bud Factor x 250ml 2340-12
$25.92 from 4 stores
the last few times and did notice that my finished product was "frostier" than before, but I am now replacing it with Insect Frass.